Back alleys, so many back alleys

I was working in a back alley once and saw a kid with his back to me, by the wall, staring at the ground. While I was working, I wondered if it was human. After a while, it started making strange noises, so I decided to leave quickly. Was it human? The second time was in an abandoned house somewhere in Tianx. I had to go through the back alley of the house for work. As I passed by, an old man in a tracksuit peeked out from inside. I showed a surprised expression, and he seemed to notice me looking at him. He rushed to the window and stared out desperately, then reached out his hand. I was very panicked and quickly passed the place. Then he followed me. I pretended not to see him and continued my work, and he suddenly popped out of a drain to scare me. With the previous experience, I pretended to be calm and pretended not to see him. After trying a few times, he seemed to realize I couldn't see him and left. I almost died, baby...